Intravenous isosorbide dinitrate and nitroglycerin administered within early hours of myocardial infarction have a marked antianginal effect, stabilize the size of necrotic focus and promptly control acute left-ventricular insufficiency. Unlike nitroglycerin, isosorbide dinitrate has a more lasting action and does not affect heart rate and arterial blood pressure. It can therefore be used more extensively in patients with acute myocardial infarction.
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